What is the discovery made in the early 1970s?
A.If the cell is unable to fight the oncogene which has become active, then cancer results.
B.How a dormant oncogene is activated.
C.Why an oncogene is inactive in normal cells.
D.How cosmic rays cause cancer.
第1题
下列药物治疗沙眼的药物中有致畸作用的是
A.磺胺醋酰钠
B.硫酸锌
C.酞丁安
D.米诺环素
E.海螵蛸
第4题
可用于治疗沙眼的处方药是
A、磺胺醋酰钠
B、硫酸锌
C、酞丁安滴眼剂
D、红霉素眼膏
E、米诺环素
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